/* ============================================================
   vaMicrosites Timeline Plugin  –  timeline.css
   Vertical timeline with alternating card layout (desktop)
   and single-column stack (mobile). Fully accessible.
   ============================================================ */

/* ── Custom properties (theming surface) ──────────────────── */
.vtln {
  --vtln-accent:          #6366f1;   /* milestone dot / spine color */
  --vtln-accent-light:    #a5b4fc;
  --vtln-spine-width:     3px;
  --vtln-dot-size:        18px;
  --vtln-dot-ring:        5px;
  --vtln-card-bg:         #ffffff;
  --vtln-card-shadow:     0 2px 12px rgba(0,0,0,.08), 0 1px 3px rgba(0,0,0,.06);
  --vtln-card-shadow-hover: 0 8px 32px rgba(99,102,241,.18), 0 2px 8px rgba(0,0,0,.10);
  --vtln-card-radius:     14px;
  --vtln-card-padding:    1.5rem;
  --vtln-spine-color:     linear-gradient(to bottom, var(--vtln-accent-light), var(--vtln-accent));
  --vtln-date-color:      #6b7280;
  --vtln-category-bg:     #ede9fe;
  --vtln-category-color:  #5b21b6;
  --vtln-text:            #111827;
  --vtln-text-muted:      #6b7280;
  --vtln-badge-bg:        #f3f4f6;
  --vtln-badge-color:     #374151;
  --vtln-gap:             2.5rem;
  --vtln-modal-bg:        rgba(0,0,0,.55);
  --vtln-media-radius:    10px;
  --vtln-ease:            cubic-bezier(.4,0,.2,1);
  --vtln-duration:        280ms;
  /* WHY: horizontal orientation height lets operators tune how tall the rail is
     via TemplateCssVariables or a page-level style without touching the plugin. */
  --vtln-h-height:        520px;
  --vtln-h-card-width:    210px;
  --vtln-caption-angle:   -20deg;
}

/* dark-mode auto-adapt */
@media (prefers-color-scheme: dark) {
  .vtln {
    --vtln-card-bg:       #1f2937;
    --vtln-card-shadow:   0 2px 12px rgba(0,0,0,.4), 0 1px 3px rgba(0,0,0,.3);
    --vtln-card-shadow-hover: 0 8px 32px rgba(99,102,241,.35), 0 2px 8px rgba(0,0,0,.4);
    --vtln-text:          #f9fafb;
    --vtln-text-muted:    #9ca3af;
    --vtln-date-color:    #9ca3af;
    --vtln-badge-bg:      #374151;
    --vtln-badge-color:   #d1d5db;
    --vtln-category-bg:   #312e81;
    --vtln-category-color:#c4b5fd;
  }
}

/* ── Root container ───────────────────────────────────────── */
.vtln {
  position: relative;
  padding: 2rem 0 4rem;
  max-width: 900px;
  margin: 0 auto;
  font-family: inherit;
  color: var(--vtln-text);
}

/* ── Spine (the vertical line) ────────────────────────────── */
.vtln::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: var(--vtln-spine-width);
  transform: translateX(-50%);
  background: var(--vtln-spine-color);
  border-radius: 9999px;
  z-index: 0;
}

/* ── Event row ────────────────────────────────────────────── */
.vtln__event {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  margin-bottom: var(--vtln-gap);
  /* WHY: opacity+translate combo for scroll-in animation; initial state */
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--vtln-duration) var(--vtln-ease),
    transform var(--vtln-duration) var(--vtln-ease);
}

/* visible state (added by IntersectionObserver) */
.vtln__event.vtln--visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delay for each child */
.vtln__event:nth-child(1)  { transition-delay:  0ms; }
.vtln__event:nth-child(2)  { transition-delay: 60ms; }
.vtln__event:nth-child(3)  { transition-delay:120ms; }
.vtln__event:nth-child(4)  { transition-delay:180ms; }
.vtln__event:nth-child(5)  { transition-delay:240ms; }
.vtln__event:nth-child(n+6){ transition-delay:300ms; }

/* Alternate: odd events on left, even on right */
.vtln__event:nth-child(odd) {
  flex-direction: row;         /* card → spine */
  justify-content: flex-end;
  padding-right: calc(50% + 1.5rem);
}
.vtln__event:nth-child(even) {
  flex-direction: row-reverse; /* spine → card */
  justify-content: flex-end;
  padding-left: calc(50% + 1.5rem);
}

/* ── Dot milestone ────────────────────────────────────────── */
.vtln__dot {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 1.1rem;
  width: var(--vtln-dot-size);
  height: var(--vtln-dot-size);
  border-radius: 50%;
  background: var(--vtln-accent);
  box-shadow: 0 0 0 var(--vtln-dot-ring) color-mix(in srgb, var(--vtln-accent) 20%, transparent);
  z-index: 2;
  transition: transform var(--vtln-duration) var(--vtln-ease),
              box-shadow var(--vtln-duration) var(--vtln-ease);
}

.vtln__event:hover .vtln__dot,
.vtln__event:focus-within .vtln__dot {
  transform: translateX(-50%) scale(1.3);
  box-shadow: 0 0 0 calc(var(--vtln-dot-ring) + 2px) color-mix(in srgb, var(--vtln-accent) 30%, transparent);
}

/* ── Dot + diagonal caption milestone mode ──────────────── */
.vtln--dot-caption .vtln__dot--milestone {
  width: calc(var(--vtln-dot-size) * 1.65);
  height: calc(var(--vtln-dot-size) * 1.65);
  box-shadow:
    0 0 0 calc(var(--vtln-dot-ring) + 1px) color-mix(in srgb, var(--vtln-accent) 26%, transparent),
    0 0 0 calc(var(--vtln-dot-ring) + 8px) color-mix(in srgb, var(--vtln-accent) 12%, transparent);
}

.vtln__caption {
  position: absolute;
  z-index: 3;
  appearance: none;
  border: none;
  background: transparent;
  color: var(--vtln-accent-light);
  font: inherit;
  font-size: .93rem;
  font-weight: 700;
  letter-spacing: .02em;
  cursor: pointer;
  white-space: normal;
  width: min(250px, calc(50vw - 3rem));
  text-align: left;
  line-height: 1.25;
  transform: rotate(var(--vtln-caption-angle));
  transform-origin: center;
  padding: .2rem .45rem;
  border-radius: 8px;
  text-shadow: 0 1px 1px rgba(0,0,0,.3);
  transition: color var(--vtln-duration) var(--vtln-ease),
              background var(--vtln-duration) var(--vtln-ease);
}

.vtln__caption:hover,
.vtln__event:focus-within .vtln__caption {
  background: color-mix(in srgb, var(--vtln-accent) 10%, transparent);
  color: #ffffff;
}

.vtln__caption:focus-visible {
  outline: 2px solid var(--vtln-accent);
  outline-offset: 1px;
}

.vtln__caption--top-right {
  left: calc(50% + 22px);
  top: .35rem;
}
.vtln__caption--top-left {
  right: calc(50% + 22px);
  top: .35rem;
  text-align: right;
}
.vtln__caption--bottom-right {
  left: calc(50% + 22px);
  top: 1.7rem;
}
.vtln__caption--bottom-left {
  right: calc(50% + 22px);
  top: 1.7rem;
  text-align: right;
}
.vtln__caption--right {
  left: calc(50% + 26px);
  top: 1.1rem;
}
.vtln__caption--left {
  right: calc(50% + 26px);
  top: 1.1rem;
  text-align: right;
}
.vtln__caption--top {
  left: 50%;
  top: -1.15rem;
  transform: translateX(-50%) rotate(var(--vtln-caption-angle));
}
.vtln__caption--bottom {
  left: 50%;
  top: 2.65rem;
  transform: translateX(-50%) rotate(var(--vtln-caption-angle));
}

.vtln--dot-caption .vtln__card {
  display: none;
}

.vtln__popover {
  position: absolute;
  z-index: 5;
  left: calc(50% + 24px);
  top: 2.5rem;
  width: min(420px, calc(50vw - 4.5rem));
  min-width: 250px;
  background: var(--vtln-card-bg);
  border-radius: var(--vtln-card-radius);
  box-shadow: var(--vtln-card-shadow-hover);
  padding: 1rem 1.1rem;
  opacity: 0;
  pointer-events: none;
  transform: translateY(4px);
  transition: opacity 150ms var(--vtln-ease),
              transform 150ms var(--vtln-ease);
}

.vtln__event:nth-child(even) .vtln__popover {
  left: auto;
  right: calc(50% + 24px);
}

.vtln.vtln--detail-hover .vtln__event:hover .vtln__popover,
.vtln .vtln__event:focus-within .vtln__popover,
.vtln.vtln--detail-click .vtln__event.vtln--open .vtln__popover {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* ── Card ─────────────────────────────────────────────────── */
.vtln__card {
  position: relative;
  background: var(--vtln-card-bg);
  border-radius: var(--vtln-card-radius);
  box-shadow: var(--vtln-card-shadow);
  padding: var(--vtln-card-padding);
  width: calc(50% - 3rem);
  cursor: pointer;
  transition: box-shadow var(--vtln-duration) var(--vtln-ease),
              transform var(--vtln-duration) var(--vtln-ease);
  /* WHY: contain layout+paint to isolate repaint cost on hover */
  contain: layout paint;
  outline: none;
}

.vtln__card:hover,
.vtln__card:focus-visible {
  box-shadow: var(--vtln-card-shadow-hover);
  transform: translateY(-2px);
}
.vtln__card:focus-visible {
  outline: 3px solid var(--vtln-accent);
  outline-offset: 2px;
}

/* arrow connector pointing toward spine */
.vtln__card::after {
  content: '';
  position: absolute;
  top: 1.25rem;
  width: 0;
  height: 0;
  border: 9px solid transparent;
}
.vtln__event:nth-child(odd) .vtln__card::after {
  right: -18px;
  border-left-color: var(--vtln-card-bg);
}
.vtln__event:nth-child(even) .vtln__card::after {
  left: -18px;
  border-right-color: var(--vtln-card-bg);
}

/* ── Date label ───────────────────────────────────────────── */
.vtln__date {
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--vtln-date-color);
  margin-bottom: .4rem;
}

/* ── Category badge ───────────────────────────────────────── */
.vtln__category {
  display: inline-block;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .03em;
  text-transform: uppercase;
  padding: .18rem .6rem;
  border-radius: 9999px;
  background: var(--vtln-category-bg);
  color: var(--vtln-category-color);
  margin-bottom: .55rem;
}

/* ── Title ────────────────────────────────────────────────── */
.vtln__title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--vtln-text);
  margin: 0 0 .5rem;
}

/* ── Description ──────────────────────────────────────────── */
.vtln__description {
  font-size: .9rem;
  line-height: 1.6;
  color: var(--vtln-text-muted);
  margin: 0 0 .75rem;
  /* Clamp to 3 lines in card view */
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── Cover image ──────────────────────────────────────────── */
.vtln__cover {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  border-radius: calc(var(--vtln-card-radius) - 4px);
  margin-bottom: .75rem;
  display: block;
}

/* ── Footer row (location + badges) ──────────────────────── */
.vtln__footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .4rem;
  margin-top: .5rem;
}

.vtln__badge {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  font-size: .75rem;
  font-weight: 500;
  color: var(--vtln-badge-color);
  background: var(--vtln-badge-bg);
  padding: .2rem .55rem;
  border-radius: 9999px;
}
.vtln__badge svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ── Year separator ───────────────────────────────────────── */
.vtln__year {
  position: relative;
  z-index: 3;
  display: flex;
  justify-content: center;
  margin: 1rem 0;
}
.vtln__year-label {
  background: var(--vtln-accent);
  color: #fff;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  padding: .25rem .9rem;
  border-radius: 9999px;
  box-shadow: 0 2px 8px color-mix(in srgb, var(--vtln-accent) 50%, transparent);
}

/* ── Load more button ─────────────────────────────────────── */
.vtln__load-more {
  display: flex;
  justify-content: center;
  margin-top: 2rem;
}
.vtln__load-btn {
  appearance: none;
  border: 2px solid var(--vtln-accent);
  background: transparent;
  color: var(--vtln-accent);
  font-size: .9rem;
  font-weight: 600;
  padding: .6rem 1.8rem;
  border-radius: 9999px;
  cursor: pointer;
  transition: background var(--vtln-duration) var(--vtln-ease),
              color var(--vtln-duration) var(--vtln-ease),
              transform 120ms var(--vtln-ease);
}
.vtln__load-btn:hover {
  background: var(--vtln-accent);
  color: #fff;
}
.vtln__load-btn:active { transform: scale(.97); }
.vtln__load-btn:disabled {
  opacity: .4;
  cursor: not-allowed;
}

/* ── Empty state ──────────────────────────────────────────── */
.vtln__empty {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--vtln-text-muted);
  font-size: .95rem;
}
.vtln__empty-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

/* ── Loading skeleton ─────────────────────────────────────── */
.vtln__loading {
  position: relative;
  min-height: 280px;
}
.vtln__loading-spine {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 3px;
  transform: translateX(-50%);
  background: linear-gradient(to bottom, #e5e7eb, #d1d5db);
  border-radius: 9999px;
  animation: vtln-pulse 1.5s ease-in-out infinite;
}
.vtln__loading-dot {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #e5e7eb;
  animation: vtln-pulse 1.5s ease-in-out infinite;
}
.vtln__loading-dot:nth-child(2) { top: 40px;  animation-delay: 0ms; }
.vtln__loading-dot:nth-child(3) { top: 140px; animation-delay: 200ms; }
.vtln__loading-dot:nth-child(4) { top: 240px; animation-delay: 400ms; }

@keyframes vtln-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: .4; }
}

.vtln__noscript {
  text-align: center;
  color: var(--vtln-text-muted);
  padding: 2rem;
}

/* ── Error state ──────────────────────────────────────────── */
.vtln__error {
  text-align: center;
  padding: 3rem 2rem;
  color: #ef4444;
  font-size: .9rem;
}

/* ═══════════════════════════════════════════════════════════
   MODAL
   ═══════════════════════════════════════════════════════════ */

.vtln-modal {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--vtln-modal-bg);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  animation: vtln-modal-in 220ms var(--vtln-ease) forwards;
  padding: 1rem;
}

@keyframes vtln-modal-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.vtln-modal.vtln-modal--closing {
  animation: vtln-modal-out 180ms var(--vtln-ease) forwards;
}
@keyframes vtln-modal-out {
  to { opacity: 0; }
}

.vtln-modal__panel {
  background: var(--vtln-card-bg);
  border-radius: 20px;
  box-shadow: 0 24px 80px rgba(0,0,0,.28);
  width: 100%;
  max-width: 680px;
  max-height: calc(100dvh - 2rem);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: vtln-panel-in 260ms var(--vtln-ease) forwards;
  position: relative;
}

@keyframes vtln-panel-in {
  from { transform: translateY(20px) scale(.97); opacity: 0; }
  to   { transform: translateY(0) scale(1);       opacity: 1; }
}

/* ── Modal header ─────────────────────────────────────────── */
.vtln-modal__header {
  padding: 1.5rem 1.5rem 1rem;
  border-bottom: 1px solid color-mix(in srgb, var(--vtln-text) 10%, transparent);
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.vtln-modal__header-meta {
  flex: 1;
  min-width: 0;
}

.vtln-modal__date {
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--vtln-date-color);
  margin-bottom: .3rem;
}

.vtln-modal__title {
  font-size: 1.35rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--vtln-text);
  margin: 0;
  word-break: break-word;
}

.vtln-modal__close {
  flex-shrink: 0;
  appearance: none;
  background: transparent;
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--vtln-text-muted);
  transition: background var(--vtln-duration) var(--vtln-ease),
              color var(--vtln-duration) var(--vtln-ease);
}
.vtln-modal__close:hover { background: var(--vtln-badge-bg); color: var(--vtln-text); }
.vtln-modal__close:focus-visible {
  outline: 3px solid var(--vtln-accent);
  outline-offset: 1px;
}
.vtln-modal__close svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2.5;
  fill: none;
  stroke-linecap: round;
}

/* ── Modal body ───────────────────────────────────────────── */
.vtln-modal__body {
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 1.25rem 1.5rem 2rem;
  flex: 1;
}

/* Scroll bar styling for supporting browsers */
.vtln-modal__body::-webkit-scrollbar { width: 6px; }
.vtln-modal__body::-webkit-scrollbar-track { background: transparent; }
.vtln-modal__body::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--vtln-text) 20%, transparent);
  border-radius: 3px;
}

.vtln-modal__description {
  font-size: .95rem;
  line-height: 1.7;
  color: var(--vtln-text-muted);
  margin: 0 0 1.25rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.vtln-modal__meta {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-bottom: 1.5rem;
}

/* ── Media section ────────────────────────────────────────── */
.vtln-modal__section-title {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--vtln-date-color);
  margin: 0 0 .75rem;
}

.vtln-media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: .6rem;
  margin-bottom: 1.5rem;
}

.vtln-media-item {
  position: relative;
  border-radius: var(--vtln-media-radius);
  overflow: hidden;
  aspect-ratio: 1;
  background: var(--vtln-badge-bg);
  cursor: pointer;
  transition: transform 160ms var(--vtln-ease),
              box-shadow 160ms var(--vtln-ease);
}
.vtln-media-item:hover { transform: scale(1.03); box-shadow: 0 4px 16px rgba(0,0,0,.15); }

.vtln-media-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.vtln-media-item__type-badge {
  position: absolute;
  bottom: 5px;
  left: 5px;
  background: rgba(0,0,0,.55);
  color: #fff;
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  padding: .15rem .4rem;
  border-radius: 4px;
  pointer-events: none;
}

.vtln-media-link {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .85rem;
  color: var(--vtln-accent);
  text-decoration: none;
  padding: .5rem .75rem;
  border-radius: 8px;
  background: var(--vtln-badge-bg);
  margin-bottom: .4rem;
  transition: background var(--vtln-duration) var(--vtln-ease);
  word-break: break-all;
}
.vtln-media-link:hover { background: color-mix(in srgb, var(--vtln-accent) 12%, transparent); }

/* ── People chips ─────────────────────────────────────────── */
.vtln-people {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 1.25rem;
}

.vtln-person-chip {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .82rem;
  font-weight: 600;
  background: var(--vtln-badge-bg);
  color: var(--vtln-badge-color);
  padding: .3rem .7rem;
  border-radius: 9999px;
  transition: background var(--vtln-duration) var(--vtln-ease);
}
.vtln-person-chip:hover { background: color-mix(in srgb, var(--vtln-accent) 12%, transparent); }
.vtln-person-chip__avatar {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--vtln-accent);
  color: #fff;
  font-size: .7rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE  –  mobile single-column
   ═══════════════════════════════════════════════════════════ */

@media (max-width: 640px) {
  .vtln::before {
    /* Spine moves to left edge on mobile */
    left: 20px;
    transform: none;
  }

  .vtln__event,
  .vtln__event:nth-child(odd),
  .vtln__event:nth-child(even) {
    flex-direction: row;
    justify-content: flex-start;
    padding-left: 52px;
    padding-right: 0;
  }

  .vtln__dot {
    left: 20px;
    transform: translateX(-50%);
  }

  .vtln__card {
    width: 100%;
  }

  .vtln--dot-caption .vtln__caption {
    left: 56px;
    right: auto;
    top: .55rem;
    transform: rotate(var(--vtln-caption-angle));
    max-width: calc(100% - 72px);
    text-align: left;
    white-space: normal;
  }
  .vtln--dot-caption .vtln__popover,
  .vtln--dot-caption .vtln__event:nth-child(even) .vtln__popover {
    left: 52px;
    right: auto;
    top: 2.75rem;
    width: calc(100% - 56px);
    min-width: 0;
  }

  /* Remove the connector arrow on mobile — card butts up against spine */
  .vtln__card::after { display: none; }

  .vtln-modal__panel {
    max-height: 96dvh;
    border-radius: 16px 16px 0 0;
    align-self: flex-end;
    margin: 0;
    max-width: 100%;
  }
  .vtln-modal {
    align-items: flex-end;
    padding: 0;
  }
  @keyframes vtln-panel-in {
    from { transform: translateY(100%); opacity: 1; }
    to   { transform: translateY(0);    opacity: 1; }
  }
}

/* ═══════════════════════════════════════════════════════════
   HORIZONTAL ORIENTATION  (.vtln--horizontal)
   Used for high-level milestone rails (e.g. davidazofeifa
   professional/personal life timeline).
   On mobile (≤640 px) it automatically reverts to a
   left-spine vertical stack — no extra config needed.
   ═══════════════════════════════════════════════════════════ */

.vtln--horizontal {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  max-width: none;
  height: var(--vtln-h-height);
  padding: 0 1.5rem;
  overflow-x: auto;
  overflow-y: visible;
  /* WHY: proximity snap keeps cards legible as the user swipes through */
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--vtln-accent) transparent;
}
.vtln--horizontal::-webkit-scrollbar { height: 5px; }
.vtln--horizontal::-webkit-scrollbar-track { background: transparent; }
.vtln--horizontal::-webkit-scrollbar-thumb {
  background: var(--vtln-accent);
  border-radius: 3px;
}

/* Horizontal spine: a line at the vertical midpoint */
.vtln--horizontal::before {
  top: 50%;
  left: 0;
  right: 0;
  bottom: auto;
  width: auto;
  height: var(--vtln-spine-width);
  transform: translateY(-50%);
  /* WHY: left→right gradient mirrors the visual reading direction */
  background: linear-gradient(to right, var(--vtln-accent-light), var(--vtln-accent));
}

/* Each event column: fixed width, full container height */
.vtln--horizontal .vtln__event,
.vtln--horizontal .vtln__event:nth-child(odd),
.vtln--horizontal .vtln__event:nth-child(even) {
  flex: 0 0 var(--vtln-h-card-width);
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
  padding: 0 .5rem;
  margin-bottom: 0;
  justify-content: flex-start;
  position: relative;
  /* WHY: slide-in from the right matches horizontal reading direction */
  opacity: 0;
  transform: translateX(20px);
  scroll-snap-align: center;
}

.vtln--horizontal .vtln__event.vtln--visible {
  opacity: 1;
  transform: translateX(0);
}

/* Dot: centered exactly on the spine */
.vtln--horizontal .vtln__dot {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
}
.vtln--horizontal .vtln__event:hover .vtln__dot,
.vtln--horizontal .vtln__event:focus-within .vtln__dot {
  /* WHY: keep the dot centered on the spine while scaling */
  transform: translate(-50%, -50%) scale(1.3);
}

.vtln--horizontal.vtln--dot-caption .vtln__caption {
  left: 50%;
  top: calc(50% - 2.2rem);
  transform: translateX(-50%) rotate(var(--vtln-caption-angle));
  white-space: normal;
  text-align: center;
  width: var(--vtln-h-card-width);
}
.vtln--horizontal.vtln--dot-caption .vtln__popover,
.vtln--horizontal.vtln--dot-caption .vtln__event:nth-child(even) .vtln__popover {
  left: 50%;
  right: auto;
  top: calc(50% + 1.6rem);
  transform: translateX(-50%) translateY(4px);
  width: min(320px, calc(100vw - 2rem));
}
.vtln--horizontal.vtln--dot-caption.vtln--detail-hover .vtln__event:hover .vtln__popover,
.vtln--horizontal.vtln--dot-caption .vtln__event:focus-within .vtln__popover,
.vtln--horizontal.vtln--dot-caption.vtln--detail-click .vtln__event.vtln--open .vtln__popover {
  transform: translateX(-50%) translateY(0);
}

/* Card: fills the column; no side connector arrow */
.vtln--horizontal .vtln__card {
  width: 100%;
  max-width: 100%;
}
.vtln--horizontal .vtln__card::after { display: none; }

/* WHY: odd events place their card in the top half — margin-bottom: auto
   pushes the card upward and leaves the bottom half empty for the spine.
   Even events do the mirror image. */
.vtln--horizontal .vtln__event:nth-child(odd) .vtln__card {
  margin-top: .75rem;
  margin-bottom: auto;
  align-self: stretch;
}
.vtln--horizontal .vtln__event:nth-child(even) .vtln__card {
  margin-top: auto;
  margin-bottom: .75rem;
  align-self: stretch;
}

/* Year separator inline in the horizontal flow */
.vtln--horizontal .vtln__year {
  flex: 0 0 auto;
  align-self: center;
  margin: 0 .25rem;
  display: flex;
  align-items: center;
  height: 100%;
}
.vtln--horizontal .vtln__year-label {
  white-space: nowrap;
}

/* Load-more sits at the end of the rail */
.vtln--horizontal .vtln__load-more {
  flex: 0 0 auto;
  align-self: center;
  margin: 0 1rem;
}

/* Loading skeleton for horizontal */
.vtln--horizontal .vtln__loading {
  min-height: unset;
  height: 100%;
  width: 100%;
  flex-shrink: 0;
}
.vtln--horizontal .vtln__loading-spine {
  top: 50%;
  left: 0;
  right: 0;
  bottom: auto;
  width: auto;
  height: 3px;
  transform: translateY(-50%);
  background: linear-gradient(to right, #e5e7eb, #d1d5db);
}
.vtln--horizontal .vtln__loading-dot:nth-child(2) { left: 25%; top: 50%; transform: translate(-50%, -50%); }
.vtln--horizontal .vtln__loading-dot:nth-child(3) { left: 50%; top: 50%; transform: translate(-50%, -50%); }
.vtln--horizontal .vtln__loading-dot:nth-child(4) { left: 75%; top: 50%; transform: translate(-50%, -50%); }

/* ── Responsive: collapse horizontal → vertical on mobile ── */
@media (max-width: 640px) {
  .vtln--horizontal {
    display: block;
    height: auto;
    overflow-x: visible;
    padding: 2rem 0 4rem;
    scroll-snap-type: none;
  }
  /* Restore left-edge vertical spine */
  .vtln--horizontal::before {
    top: 0;
    bottom: 0;
    left: 20px;
    right: auto;
    width: var(--vtln-spine-width);
    height: auto;
    transform: none;
    background: var(--vtln-spine-color);
  }
  .vtln--horizontal .vtln__event,
  .vtln--horizontal .vtln__event:nth-child(odd),
  .vtln--horizontal .vtln__event:nth-child(even) {
    flex: none;
    width: 100%;
    height: auto;
    flex-direction: row;
    align-items: flex-start;
    padding-left: 52px;
    padding-right: 0;
    margin-bottom: var(--vtln-gap);
    opacity: 0;
    transform: translateY(24px); /* revert to vertical slide-in */
    scroll-snap-align: none;
  }
  .vtln--horizontal .vtln__dot {
    position: absolute;
    left: 20px;
    top: 1.1rem;
    transform: translateX(-50%);
  }
  .vtln--horizontal .vtln__event:hover .vtln__dot,
  .vtln--horizontal .vtln__event:focus-within .vtln__dot {
    transform: translateX(-50%) scale(1.3);
  }
  .vtln--horizontal .vtln__event:nth-child(odd) .vtln__card,
  .vtln--horizontal .vtln__event:nth-child(even) .vtln__card {
    width: 100%;
    margin: 0;
    align-self: auto;
  }
  .vtln--horizontal .vtln__year {
    height: auto;
    margin: 1rem 0;
    justify-content: center;
  }
  .vtln--horizontal .vtln__load-more {
    margin: 2rem 0 0;
    justify-content: center;
    display: flex;
  }
}

/* ── Reduced motion ───────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .vtln__event,
  .vtln--horizontal .vtln__event,
  .vtln__card,
  .vtln__dot,
  .vtln-modal,
  .vtln-modal__panel,
  .vtln-media-item {
    transition: none !important;
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .vtln__loading-spine,
  .vtln__loading-dot { animation: none !important; }
}